The Eco-Fast Digital Thermometer is a battery-operated accurate digital thermometer that is fast and safe. It is ideal for use for horses and other pet animals. Reads up 108-degrees Fahrenheit. Operated with a 55V button size battery (included) that can run for more than 200 hours of continuous use. This thermometer has an easy-to-read liquid crystal display of 3.5 digits and features a beeper. Has an approximately 30-60 second read time for another operation.